Air inlet and mixing device for internal-combustion engines



Sept. 18,1923. 1,468,6943

F. c. TABLER AIR INLET AND MIXING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Oct. 25, 1919 mouth of which is located immediately Patentedsept. 18, 19233.

STATES rm 0. rerun, or s'r. LOUIS, mrssouar.

AIR INLET-AND MIXING DEVICE FOR INTERNALCOMBD'STION nn'ern'm.

Application filed October 25, 1919. Serial No. 333,140.

To all whom it may concern:

Be it known that I, FRANK C. T ABLER, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Air Inlet and Mixing Devices for Internal-Combustion Engines, of which the following 18 a full, clear, and exact description, such as will enable others skilled in the art to which, it appertains to make and use the same, reference being had to the accompanying drawin s, forming part of this specification.

ily inventlon relates generally to internal combustion engines an more particularly to a device in the form of a valve that is connected directl to the intake manifold of the engine, an which device, when properly operated, admits air into the intake manifold, which air is mixed with the combustible vapor passing from the carbureter to the ignition chambers of the engine.

The principal objects of my invention are,

to provide a relatively simple and eflicient air inlet and mixin device which can be readily applied tot e intake manifolds of practically all forms of internal combustion engines now in general use; and to provide connections whereby said device may be regulated and controlled directly from parts of the spark or gas controlling mechanisms associated with the internal combustion enne. Furtherobjects of may invention are, to rovide an air inlet an mixing valve that is self-closing; to provide a construct on having a combined mixing and deflectlng plate that projects into the intake manifold, said mixing plate or deflector being perforated in order to effect a thorough mixing of the air with the combustible vapor passing through said manifold; to provide the device with an air inlet connection, 35c jacent to the exhaust manifold of the engine, whereby the air taken into and through the device is preheated, thereby m-atenally increasin the efiiciency of the attachment; and, furt er, to provide a device which can be easily and cheaply produced and wh ch will be very effective in performlng its intended functions.

With the foregoing and other ob ects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is an e evational view of the intake manifold of an internal combustion engine, and showing In improved air inlet and mixing device applied thereto.

Figure 2 is an enlarged vertical section taken approximately on the line 2-2 of Figure 1.

Fi re 3 is an elevational view of the attac ment with parts in section and showing the device in osition to admit air to the intake manifold.

Figure 4 is a horizontal section taken approximately on the line 4-4 of Figure 2.

Figure 5 1s a fra menta perspective view of a portion of t e housing of the device and showing the ports therein.

Figure 6 is a fragmentary erspective of the inner movable portion of the housing and showing the ports therein.

Referring by numerals to the accompanying drawin s, 10 designates the engine cylinders, 11 t e exhaust manifold, 12 the 1ntake manifold, and 13 the tubular connec giolr from the carbureter to said intake mani- The attachment contemplated by my invention includes a housing composed of a flat side wall 14, and an annular wall 15, said housin being provided with suitable ears or pro ections 16 which receive screws to secure the device 'to the intake manifold. Formed through the annular wall 15 are ports 17 and 18 and secured in any suitable manner to said annular wall is a ring 19, the opening in which communicates with the port 18. This ring projects through a suitable opening 20 formed through the wall ofthe intake manifold 12, and formed integral with or fixed to said ring is a plate 21 that projects into the passageway through the manifold 12. This plate 21 is preferably curved in cross section and it is perforated as designated by 22 in order'to divide .the air delivered to the intake'manifold by the device into relatively small jets, thereby effecting a thorou h mixture of said air with the combustib e vapor passing through the manifold.

Securedto the annular wall 15 andsurrounding'port 17 is the lower end of a tubular member 23, the up r end of which terminates adjacent to t e exhaust manifold 11 and the mouth or inlet end of this llllll ,tubular member is provided with a reticjecting arm 27 which is adapted to trans-' verse a slot 28, which latter is formed in theedge of annular wall 15 and the ends of said slot forming stops to limit the movement of said arm. V

Removably positioned in the center of wall 14 is one end of a non-circular bolt 29, the opposite end of which is reduced and formed into a cylindrical member 30, which has bearing in the center of plate 25. Seated in this end of the bolt is a screw 31, the head of which serves to retain the member comprising the walls 25 and 26 within the housing comprising the walls 14 and 15.

Removably positioned on the non-circular bolt 29 is a block 32 to which is secured the inner end of a helical spring 33, the outer end thereof being detachably connected to a pin 34 that is seated in Wall 25. This spring 33 is normally under tension and holds the housing comprising the walls 25 and 26 in position, as illustrated by dotted lines in Figure 3.

Formed in the annular wall 26 is a slot 35 which forms a port that is adapted to register with port 17 and formed in said wall 26 is a second slot 36 which provides a port that is adapted to register with port 18. Pivotally connected to the outer end of arm 27 is a rod 37 and pivotally connected to the other end of this rod is one end of a crank arm 38 that is preferably mounted on a part 39 of the spark control mecha nism associated with the engine, or, if desired, this crank arm may be connected with a part of the gas control mechanism. The operation of my improved air inlet and mixing device is as follows:

-When part 39 of the spark or gas control mechanism is actuated, crank arm 38 will be swung laterally a short distance,

thereby correspondingly swinging arm 27 through push rod 37 and thus the housing comprising the walls 25 and 26 will be rotated within the fixed housing and the ends of the slots 35 and 36 will be brought into register with the ports 17 and 18 respectively.

On the suction stroke of the engine, air will be drawn throu h tubular member 23 and will pass throug ports 17 and 35 and from thence through ports 36 and 18 and discharge into the ntake manifold directly in the path of travel of the combustible vapor drawn therethrough and this air will, by suction, be drawn through the apertures 22 of: the mixing plate and at the same time, a portion of the combustible vapor will be drawn throu h said apertures,

thereby effecting a very t orough mixture of the air with the combustible vapor, and such mixture will pass into the combustion chambers of the engine.

As the spark control mechanism is operated to a Vance the spark to normal running position, the ports 35 and 36 are brought into full register with the ports 17 and 19 as shown in Figure 3, and thus a considerable volume of air is permitted to enter the'intake manifold to mix. with the vapor passing therethrough, and thereby materially increasing the efliciency of the engine.

hould any of the connections between lever 27 and member 39 become broken, the power stored in spring 33 will act to rotate the inner housin so that the ports 35 and 29 so that it can-be readily removed and reversed in position and which arrangement is essential In order that the device may be used on different forms of intake manifolds.

An air inlet and mixing device of my improved construction can be easil and cheaply manufactured, can be app ied to practically all forms of intake manifolds and said device possesses superior advantages in point of simplicity, durability and general efliciency.

It will be readily understood that minor changes in the size, form and construction of the various parts of my improved air inlet and mixin device can be made and substituted for t ose herein shown and described without departing from the spirit of my invention, the sec e of which is set forth'in the appended c aims.

I claim:

1. In an air inlet and mixing device for internal combustion engines, a cylindrical housin adapted to be secured to the intake manifo d of the engine, a perforated mixing plate carried by said housing and projecting into and across the passageway through the intake manifold, a second cylindrical housin mounted for rotary movement within t e fixed housing, there bein orts formed in the cylindrical walls of sai ousings, which ports are adapted to register when the rotatable housing is shifted to essors a certain position, and operating connections for said rotatably mounted housing.

2. An air inlet and mixing device for in ternal combustion engines comprising a housing formed in two parts, each of which is formed with an annular flange, the flange of one part being operatively arranged within the flange of the other part, one of said parts being movable with respect to the other, means for holding the parts of the housing in assembled relation, a sprin associated with the movable part of the housing and tending to rotate the same in one direction, the flanges of the parts of the housing being provided with ports which are adapted to register when the movable part of the housing is shifted to a certain osition, and a perforated mixing plate carried by the relatively stationary portion of the housing and extending into and across the passageway throughthe intake manifold with which the device is associated.

3. An air inlet and mixing device for internal combustion engines comprising a housing formed in two cylindrical parts, one ofwhich is movable with respect to the other, means for holdingthe parts of the housing in assembled relation, a sprin associated with the movable part of the ousing and tending to rotate the same in one. direction, the peripheral walls of said parts of the housing being provided with ports which are adapted to register when the movable parts of said housing is shifted to a certain position, a perforated mixing plate carried by the relatively stationary portion of the housing and extending into and across the passageway through the intake manifold with which the device is associated, and an arm projecting from the movable part of the housing, which arm is adapted to receive operating connections.

4. An air inlet and mixing device for internal combustion engines comprising a housing formed in two parts, one of which is movable with respect to the other, means for holding the parts of the housing in assembled relation, a spring associated with the movable part of the housing and tending to rotate the same in one direction, the parts of the housing being provided with ports which are adapted to register when the movable housing is shifted to a certain position,

a perforated mixing plate carried by the projecting from one of the ports in the relatively stationary housing.

5. In an air lnlet and mixing device for internal combustion engines, a relatively stationary housing having a circular wall provided with inlet and outlet ports, a perforated mixing member projecting from said housing around the outlet port which perforated mixing member is adapted to project into and across the passageway in the intake manifold of the engine with which the device is associated, a movable housing having a circular wall engaging the circular wall of said stationary housing and provided with ports which are adapted to register with the inlet and outlet ports in the wall of said stationary housing, and means for shifting the position of said movable housing.

6. In an air inlet and mixing device for internal combustion engines, a relatively stationary housing provided in one of its walls wi h inlet and outlet ports, a perforated mixing member projecting from said housing around the outlet port which perforated mixing member is adapted to project into and across the passageway in the intake manifold of the engine with which the device is associated, a movable housing associated with said stationary housing and provided with ports which are adapted to register with the inlet and outlet ports in said stationary housing, a spring arranged within said movable housing and associated therewith for tending to rotate the same in one direction, and means associated with said movable housing for moving it against the resistance ofi'ered by said spring.

In testimony whereof I hereunto affix my signature this 21st day of October, 1919.

FRANK G. TABLER. 

